I'm not sure what the problem is but you've spent the money so it's gone. You've had your notification with the till receipt which also shows the account debit transaction so there should be no surprises, unless you like spending the same money twice.
I've designed and built my own reconciliation system for various accounts I use (current, cash, C/U, Post Office, etc) and use transaction, debit/confirmation and reconciliation dates to keep track of money at the transaction level and thereby, the balances.
Surprises are few and far between for me and very quickly resolved, like the direct debit for €44.40 in favour of Sullivan Insurances for a cancelled motor policy that appeared on the 27th December, since credited back to my account. I spent 5 months since early August 2018 vainly trying to set up a direct debit with this shower of cowboys. Once I'd cancelled and placed the business with another broker, suddenly direct debits appear.